JP6389690B2 - Linear motor and circuit breaker using the same - Google Patents

Description

  The present invention relates to a linear motor and a circuit breaker using the linear motor, and more particularly to a linear motor that generates a thrust for relatively horizontal movement between a permanent magnet of a mover and an armature, and to open / close the circuit breaker. The present invention relates to a circuit breaker used as an operating device for performing an operation.

  A linear motor is used in many various applications. As an example, a linear motor having a primary part and a secondary part magnetically coupled to the primary part that can move upward is disclosed in Patent Document 1. It is described in.

  In the linear motor described in Patent Document 1, the secondary part is at least a first part and a second part in the moving direction of the primary part so that the output range of the linear motor can be more appropriately adapted to a special application. And the secondary part is shaped differently in the first part than in the second part and / or formed from another material, so that the primary part can be It is described that the secondary part part is useful for passive braking, since different speeds of the primary part can be achieved in some cases, and in some cases a short-circuit winding can be inserted into one secondary part part. Yes.

Special table 2009-532003

  However, since the above-mentioned Patent Document 1 uses the induction phenomenon generated in the short-circuit winding inserted in the secondary part portion for passive braking, the braking is mainly used for deceleration of the primary part. Active braking is necessary for the stop position after deceleration. That is, since Patent Document 1 does not have a function necessary for holding the position of the mover and correcting the shift, the mover stops at a position shifted from an arbitrary position, or when the mover is subjected to an external force such as vibration. If this happens, the problem is that this cannot be prevented by only passive braking, and the mover cannot be held at an arbitrary position.

  The present invention has been made in view of the above points, and the object of the present invention is when the mover stops at a position deviated from an arbitrary position, or when the mover is moved unexpectedly by an external force. However, it is an object of the present invention to provide a linear motor capable of holding a mover at an arbitrary position by a passive braking force and a circuit breaker using the linear motor.

In order to achieve the above object, a linear motor according to the present invention includes a mover having permanent magnets in which poles are alternately arranged in the drive direction, and magnetic pole teeth arranged to face the permanent magnet of the mover. A first armature comprising a magnetic body connecting a plurality of magnetic pole teeth to form a magnetic flux path and a winding disposed on the magnetic pole teeth, and a second armature having the same configuration as the first armature. The first armature and the second armature are coaxially arranged adjacent to each other, and the mover has at least two partition portions having different intervals between the permanent magnets. parts, the first of said at armature and intervals equal to the magnetic pole teeth of the second armature permanent magnet is disposed, the other compartment of the previous SL first armature and the second armature the magnetic pole interval of the teeth are arranged the permanent magnet at different intervals, before and the one compartment In the other partition portions, the interval between the permanent magnets is the same between the respective partition portions, and the interval between the permanent magnets in the one partition portion is narrower than the interval between the permanent magnets in the other partition portion. It is characterized by that.

In order to achieve the above object, the linear motor of the present invention is disposed so as to face a mover having a permanent magnet in which poles are alternately arranged in the driving direction, with the permanent magnet of the mover interposed therebetween. A first magnetic pole tooth, a second magnetic pole tooth, an armature core connecting the first magnetic pole tooth and the second magnetic pole tooth, and windings disposed on the first magnetic pole tooth and the second magnetic pole tooth, respectively; Comprising a plurality of first armature units arranged in the driving direction at a predetermined interval, and a second armature unit having the same configuration as the first armature unit, The first armature unit and the second armature unit are arranged adjacent to each other on the same axis, and the mover has at least two compartments having different intervals between the permanent magnets, and one of the compartments The first armature unit and the second armature unit. Said first pole tooth and the permanent magnet in the second magnetic pole teeth equal intervals are arranged in the other compartment, said first pre-Symbol first armature unit and the second armature unit The permanent magnets are arranged at intervals different from the intervals between the magnetic pole teeth and the second magnetic pole teeth, and the interval between the permanent magnets is different between the one partition portion and the other partition portion. In addition, the distance between the permanent magnets in the one partition part is narrower than the distance between the permanent magnets in the other partition part.

  Moreover, the circuit breaker of the present invention is a circuit breaker using the linear motor having the above-described configuration as an operating device for performing an opening / closing operation of the circuit breaker, wherein the linear motor has the one partition portion of the mover, It arrange | positions so that it may be located in the interruption | blocking part side, It is characterized by the above-mentioned.

  According to the present invention, even when the mover stops at a position deviated from an arbitrary position or the mover is moved unexpectedly by an external force, the mover is moved to an arbitrary position by a passive braking force. Can be held in.

It is a perspective view which shows Example 1 of the linear motor of this invention. FIG. 2 is a cross-sectional view showing a state where the linear motor of FIG. 1 is cross-sectioned along a YZ plane. FIG. 2 is a cross-sectional view illustrating a state in which the linear motor of FIG. 1 is cross-sectioned along an XY plane. It is a figure for demonstrating the magnetization direction of the permanent magnet in Example 1 shown in FIG. It is an expansion of the magnetic pole tooth part which omitted winding in Example 1 of the present invention, and is a figure for explaining the direction of the attractive force which acts between one permanent magnet and each magnetic pole tooth. It is a figure for demonstrating the cogging force of each division part which obtains the braking force in Example 1 of this invention. It is a figure for demonstrating the analysis result of the cogging force for confirming the effect in Example 1 of this invention. It is a perspective view which shows Example 2 of the linear motor of this invention. It is sectional drawing which shows the state which carried out the cross section of the linear motor of FIG. 8 in the YZ plane. It is a perspective view which shows Example 3 of the linear motor of this invention. It is sectional drawing which shows the state which carried out the cross section of the linear motor of FIG. 10 by XY plane. It is sectional drawing which shows the state which carried out the cross section of the linear motor of FIG. 10 in the YZ plane. As Example 4 of this invention, it is a figure which shows the circuit breaker carrying the linear motor in any one of Example 1 thru | or 3 as an operating device which opens and closes a circuit breaker. It is a figure which shows the modification of the circuit breaker demonstrated in Example 4 as Example 5 of this invention.

  Hereinafter, a linear motor of the present invention and a circuit breaker using the same will be described based on the illustrated embodiments. In addition, in each Example, the same code | symbol is used for the same component.

  1 to 4 show a linear motor according to a first embodiment of the present invention.

  As shown in the figure, a linear motor 100A of the present embodiment includes a mover 11 having a plurality of permanent magnets 1 arranged with magnet intervals P and R with poles alternately arranged in the driving direction, and a permanent movement of the mover 11. Magnetic pole teeth 5 arranged side by side with an armature interval Q so as to face the magnet 1, and a plurality of these magnetic pole teeth 5 are connected to the armature core 4 and magnetic pole teeth 5 which are magnetic bodies forming a magnetic flux path. And a second armature 8 having the same configuration as the first armature 6, and the first armature 6 and the second armature 8 are coaxial. Arranged adjacently on the top, it is schematically configured.

  The linear motor 100A of the present embodiment is an example in which a three-phase motor is configured, and the first armature 6, the second armature 8 and the mover 11 are relatively linearly moved. The driving direction of the motor 100A is the Z direction.

  In this embodiment, the three-phase linear motor 100A is configured by arranging the magnetic pole teeth 5 of the first armature 6 and the second armature 8 so that the phases are electrically shifted by 120 ° each. Yes. Similarly, a m-phase driven linear motor can be configured by shifting the phase of 360 magnetic pole teeth by 360 ° / m.

  In this embodiment, the mover 11 has at least two partition portions having different intervals (magnet intervals P and R) between the permanent magnets 1, and one of the partition portions 12 includes the first armature 6. The permanent magnets 1 are arranged at equal intervals with the magnetic pole teeth 5 of the second armature 8 (the axial centers of the permanent magnet 1 and the magnetic pole teeth 5 are also aligned). The permanent magnets 1 are arranged at intervals of the magnetic pole teeth 5 of the first armature 6 and the second armature 8 different from the part 12.

  Hereinafter, this will be described with reference to FIG. FIG. 4 shows the magnetization direction of the permanent magnet 1 in the first embodiment.

  In the figure, the permanent magnet 1 has a surface facing the magnetic pole teeth 5 as a magnetization direction. Further, as described above, the mover 11 has at least two partition portions having different magnet intervals P and R. One of the rows of the partition portions 12 is formed by arranging a plurality of permanent magnets 1 at intervals of a magnet interval R in the driving direction. The magnet interval R is arranged equal to the armature interval Q. On the other hand, the rows of the other partition portions 13 are configured by arranging a plurality of permanent magnets 1 in the driving direction at intervals of the magnet interval P (R <P) wider than the magnet interval R.

  Moreover, in the one partition portion 12 and the other partition portion 13, the interval between the permanent magnets 1 is the same between the partition portions, and the dimension width in the driving direction of the permanent magnet 1 arranged in the one partition portion 12. And the dimension width of the drive direction of the magnetic pole tooth 5 is formed equally. Although the magnet interval P of the other partition part 13 is generally P = 3Q / 2, a present Example is not restricted to this. Moreover, the path | route of the magnetic flux of the 1st armature 6 and the 2nd armature 8 shown in FIG. 4 generate | occur | produces between the adjacent permanent magnets 1, and is comprised by the shortest path | route in an armature.

  The mover 11 includes a plurality of permanent magnets 1 and a mover plate 2 in which holes for disposing the permanent magnets 1 are formed in a non-magnetic plate. The mover 11 extends in the vertical direction with respect to the magnetic pole teeth 5. The first armature 6 and the second armature 8 are arranged to face each other with the gap 7A therebetween. Moreover, in the one partition part 12 and the other partition part 13, the magnetization direction of the adjacent permanent magnet 1 is arrange | positioned alternately.

  In the linear motor 100A having the above configuration, when the mover 11 is moved in the driving direction (X direction), the plurality of permanent magnets 1 are attracted to the armature by the action of the magnetic flux.

  FIG. 5 shows an enlargement of the magnetic pole tooth 5 portion in which the winding 3 in the first embodiment shown in FIGS. 1 to 4 is omitted, and acts between one permanent magnet 1 and each magnetic pole tooth 5. It shows the direction of the suction force. In this figure, the distance E is the distance in the Y direction between the permanent magnet 1 and the magnetic pole teeth 5 and is the same distance as the gap 7A. In FIG. 5, the suction force in the Z direction is a cogging force.

  In the present embodiment, when the permanent magnet 1 is continuously advanced in the Z direction, the permanent magnets 1 of the one partition 12 and the other partition 13 have the first armature 6 and the second armature 8. As shown in FIG. 6, the cogging force of one partition 12 and the other partition 13 generated by the suction is periodically changed with respect to the driving direction.

  The cogging force in the linear motor 100A is a combination of two types of cogging forces shown in FIG. 6, and the magnitude of the cogging force in the linear motor 100A is determined by the permanent magnets 1 in one partition 12 and the other partition 13. It changes in the ratio of the area which opposes the 1st armature 6 and the 2nd armature 8.

  The cogging force generated in one permanent magnet 1 is minimum when the magnetic pole teeth 5 and the center of the permanent magnet 1 are aligned, and is maximum when the angle between the direction of the attractive force and the Z axis is 45 °. For this reason, in the some permanent magnet 1 arrange | positioned at the one division part 12, the attraction | suction force with which the direction was equal equally with respect to the magnetic pole tooth 5 generate | occur | produces, respectively. Since one partition 12 can generate a suction force in the same direction, the cogging force generated in one partition 12 can be larger than the cogging force generated in another partition 13.

  For this reason, in the linear motor 100A of the present embodiment, the position of the mover 11 where the plurality of magnetic pole teeth 5 are most opposed to the permanent magnet 1 of one partitioning portion 12 is set as the holding position, and the mover 11 is held by the external force. Therefore, it is possible to passively brake the movement of the movable element 11 and prevent the position of the movable element 11 from deviating from the holding position. About the holding position of the needle | mover 11, it can change according to an application by designing the space | interval between the division parts of the drive direction of the one division part 12 and the other division part 13 to an arbitrary dimension.

  In addition, since the braking by the cogging force uses a non-contact magnetic attraction force, the performance does not deteriorate depending on the number of times of use. That is, the braking force of the present embodiment is a permanently sustainable function, which is advantageous for improving the reliability of the device.

  Further, in the first armature 6 and the second armature 8, when the mover 11 is operated in the driving direction, thrust in the driving direction is individually generated when facing the other partitioning portion 13. Therefore, driving from the holding position is also possible arbitrarily.

FIG. 7 shows the analysis result of the cogging force that demonstrates the effect of the present embodiment. In the figure, one partition 12 and the second armature 8 face each other at a position where the electrical angle is 0 °. At a position where the electrical angle is 0 °, thrust in the direction opposite to the moving direction of the mover 11 is generated, and a larger cogging force is obtained than in the state of facing only the other partition part 13. That is, a braking force with an electrical angle of 0 ° as a holding position is obtained.

  By adopting such a configuration of the present embodiment, even if the mover 11 stops at a position shifted from an arbitrary position, or even when the mover 11 is unintentionally shifted by an external force, it is passive. There exists an effect which can hold | maintain the needle | mover 11 in arbitrary positions with braking force.

  In the above-described embodiment, an example in which one partition portion 12 and one other partition portion 13 are arranged one by one has been described. However, a plurality of one partition portion 12 and other partition portions 13 are alternately disposed. It doesn't matter. Further, although the linear motor 100A is driven in the Z direction, it may be driven in the opposite direction.

  8 and 9 show a second embodiment of the linear motor of the present invention. Since the configuration of the linear motor 100B of this embodiment shown in the figure is substantially the same as that of the first embodiment, detailed description thereof is omitted here.

  The present embodiment shown in the figure has substantially the same configuration as the linear motor 100A shown in the first embodiment, but the first armature 6 and the second armature 8 shown in FIG. A third armature 9 and a fourth armature 10 having the same configuration as the armature 6 and the second armature 8 are respectively arranged so as to sandwich both surfaces of the mover 11, and magnetic fluxes are formed on both surfaces of the mover 11. The path is formed.

That is, a magnetic flux path is formed on both surfaces of the mover 11 to increase the attractive force of the magnetic flux acting on the permanent magnet 1.
According to the present embodiment, the same effect as that of the first embodiment can be obtained, and the improvement of the braking force proportional to the suction force can be realized. Further, the Y-direction component of the suction force is generated in the opposite directions in the first armature 6 and the third armature 9 and in the second armature 8 and the fourth armature 10, respectively. The forces are offset and become smaller. For this reason, the present embodiment can design the support in the Y direction of the movable element 11 to be smaller than the first embodiment (for example, the support roller that supports the movable element 11 can be made smaller).

  10 to 12 show a third embodiment of the linear motor of the present invention. Since the configuration of the linear motor 100C of this embodiment shown in the figure is substantially the same as that of the first embodiment, detailed description thereof is omitted here.

  In the present embodiment shown in the figure, the configuration is substantially the same as that of the linear motor 100A shown in the first embodiment. However, one armature 14 includes a first magnetic pole tooth 15 and a second magnetic pole tooth 15 facing each other with a gap 7B interposed therebetween. Magnetic pole teeth 16, armature cores 17 connecting the first magnetic pole teeth 15 and the second magnetic pole teeth 16, and the windings 3 disposed on the first magnetic pole teeth 15 and the second magnetic pole teeth 16, respectively. ing. Further, the first armature unit 18 and the second armature unit 19 arranged adjacent to each other on the same axis align three armatures 14 in the driving direction (Z direction) at intervals of the armature interval Q. It is formed and has the same configuration.

  The mover 11 has at least two partition portions having different intervals between the permanent magnets 1, and one of the partition portions (a portion corresponding to the second armature unit 19) 12 is a first armature. The permanent magnet 1 is arranged at the same interval as the first magnetic pole teeth 15 and the second magnetic pole teeth 16 of the unit 18 and the second armature unit 19, and other partition portions (corresponding to the first armature unit 18). In the portion 13, the permanent magnet 1 is arranged at an interval between the first magnetic pole teeth 15 and the second magnetic pole teeth 16 of the first armature unit 18 and the second armature unit 19 different from the one partitioning portion 12. ing.

  The magnetic flux path of the armature core 17 included in the armature 14 of this embodiment is shown in FIG. As shown in the figure, in one armature 14, the magnetic flux path is first magnetic pole tooth 15 → armature iron core 17 → second magnetic pole tooth 16, and is independent of the magnetic flux paths of other armatures. Therefore, there is no magnetic interference.

  According to this embodiment, the same effects as those of the first embodiment can be obtained, and a braking force larger than that of the first embodiment can be obtained because the attractive force acts on both surfaces of the permanent magnet 1. Further, since the magnetic flux paths are independent, a stable braking force can be obtained without being affected by the leakage magnetic flux from other phases.

  Although not particularly illustrated, at least two movable elements 11 having the same configuration as described above are connected in the width direction (X direction) to form a movable element unit. Even when the linear motors have different intervals between the permanent magnets 1 in the other partition portions 13, the same effects as those of the first embodiment can be obtained.

  FIG. 13 shows, as a fourth embodiment of the present invention, a circuit breaker in which the linear motor having any one of the configurations of the first to third embodiments described above is mounted as an operating device for opening and closing the breaking section.

  As shown in the figure, the circuit breaker 21 according to the present embodiment uses the linear motors 100A, 100B, and 100C having any of the configurations described in the first to third embodiments as an operating device for the circuit breaker 21. The movable element 11 is directly or indirectly connected to a movable part (not shown) such as a movable electrode.

  In the present embodiment, any one of the linear motors 100A, 100B, and 100C is arranged such that one section 12 of the mover 11 is positioned on the circuit breaker 21 side.

  In this embodiment, the direction of the closing operation of the circuit breaker 21 is the direction indicated by reference numeral 22, and the driving force in the closing operation direction 22 is generated in the other section 13 during the closing operation. Reference numeral 20 denotes an armature.

  According to such a present Example, since the effect similar to Example 1 thru | or 3 is acquired, since the needle | mover 11 exists in the same position before injection | throwing-in start, there are few dispersion | variations in energy required for each injection | throwing-in. Thus, a circuit breaker with high operational reliability can be configured.

  FIG. 14 shows a modification of the circuit breaker described in the fourth embodiment as the fifth embodiment. In the present embodiment shown in the figure, in addition to the configuration of the fourth embodiment, the movable element 11 is fixed at the closing start position, and only the armature 20 on the anti-blocking part side is energized and operated at the start of the closing operation. A latch 23 is provided in the mover 11 on the side opposite to the circuit breaker 21. Other configurations are the same as those of the first embodiment.

  According to the present embodiment, the same effect as that of the fourth embodiment can be obtained, and the mechanical latch 23 can be made more effective by passively attenuating the operation energy such as vibration caused by the disturbance. It is possible to design with a small dimension, and the safety and device reliability of the circuit breaker 21 can be improved.

  In addition, this invention is not limited to an above-described Example, Various modifications are included. For example, the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. It is possible to add, delete, and replace the configuration of a part of the configuration of the embodiment.

  DESCRIPTION OF SYMBOLS 1 ... Permanent magnet, 2 ... Movable member plate, 3 ... Winding, 4, 17 ... Armature core, 5 ... Magnetic pole tooth, 6 ... 1st armature, 7A, 7B ... Air gap, 8 ... 2nd armature , 9 ... 3rd armature, 10 ... 4th armature, 11 ... Movable element, 12 ... One division part, 13 ... Other division parts, 14, 20 ... Armature, 15 ... 1st magnetic pole tooth , 16 ... second magnetic pole teeth, 18 ... first armature unit, 19 ... second armature unit, 21 ... circuit breaker, 22 ... closing direction, 23 ... mechanical latch, 100A, 100B, 100C ... Linear motor, P, R: Magnet spacing, Q: Armature spacing.

Claims (10)

A mover having permanent magnets in which poles are alternately arranged in the driving direction; magnetic pole teeth arranged to face the permanent magnets of the mover; a plurality of magnetic pole teeth connecting the magnetic pole teeth to form a magnetic flux path; and A first armature composed of windings disposed on the magnetic pole teeth, and a second armature having the same configuration as the first armature, wherein the first armature and the second armature are Arranged adjacent to each other on the same axis,
The mover has at least two partition portions having different intervals between the permanent magnets, and one of the partition portions has the same interval as the magnetic pole teeth of the first armature and the second armature. a permanent magnet is disposed, the other compartment is disposed the permanent magnet at different intervals from the previous SL first armature and spacing of the magnetic pole teeth of the second armature,
The one partition part and the other partition part have the same interval between the permanent magnets between the respective partition parts, and the interval between the permanent magnets in the one partition part is the same as that of the other partition part. A linear motor characterized by being narrower than the interval between permanent magnets. The linear motor according to claim 1,
A linear motor characterized in that a dimension width in the driving direction of the permanent magnet arranged in the one partition portion is equal to a dimension width in the driving direction of the magnetic pole teeth. In the linear motor according to claim 1 or 2,
The first armature and the second armature, and the third armature and the fourth armature having the same configuration as the first armature and the second armature, A linear motor characterized by being arranged so as to sandwich both surfaces. The linear motor according to claim 3,
A linear motor characterized in that magnetic flux paths are formed on both surfaces of the mover. In the linear motor according to any one of claims 1 to 4,
It is provided with a mover unit in which at least two movers having the same configuration are connected in the width direction, and the interval between the permanent magnets in the one partition part and the other partition part of the mover unit is different. Features a linear motor. A mover having a permanent magnet in which poles are alternately arranged in the driving direction, a first magnetic pole tooth and a second magnetic pole tooth arranged so as to face each other with the permanent magnet of the mover interposed therebetween, and the first magnetic pole A plurality of armatures including armature cores connecting the teeth and the second magnetic pole teeth and windings respectively arranged on the first magnetic pole teeth and the second magnetic pole teeth in the driving direction with a predetermined interval. A first armature unit to be disposed, and a second armature unit having the same configuration as the first armature unit, wherein the first armature unit and the second armature unit are coaxial. Placed adjacent to
The mover has at least two partition portions having different intervals between the permanent magnets, and one of the partition portions is the first magnetic pole of the first armature unit and the second armature unit. the equal spacing between the teeth and the second magnetic pole teeth permanent magnets are disposed, the other compartment of the previous SL said first pole tooth and the second first armature unit and the second armature unit The permanent magnets are arranged at intervals different from the intervals between the magnetic pole teeth of
The one partition part and the other partition part have the same interval between the permanent magnets between the respective partition parts, and the interval between the permanent magnets in the one partition part is the same as that of the other partition part. A linear motor characterized by being narrower than the interval between permanent magnets. The linear motor according to claim 6,
A linear motor characterized in that a dimension width in the driving direction of the permanent magnet arranged in the one partition portion is equal to a dimension width in the driving direction of the first magnetic pole teeth and the second magnetic pole teeth. In the linear motor according to claim 6 or 7,
A linear motor characterized in that a path of magnetic flux of the armature is independent of a path of magnetic flux of other armatures. A circuit breaker using the linear motor according to any one of claims 1 to 8 as an operating device for performing an opening / closing operation of a breaking unit,
The said linear motor is arrange | positioned so that the said one division part of the said needle | mover may be located in the said interruption | blocking part side, The circuit breaker characterized by the above-mentioned. The circuit breaker according to claim 9,
A circuit breaker comprising: a mechanical latch that fixes the movable element at a loading start position and operates by energizing only the armature on the anti-blocking portion side at the start of the loading operation.

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